.index {
  width: 100%;
  box-sizing: border-box;
  display: grid;
  grid-template-columns: repeat(3, 100px);
  grid-template-rows: repeat(3, 100px);
  grid-gap: 30px, 30px;
  overflow-x: scroll;
}
.index .index_item {
  border: 1px solid red;
}
